stnolting/neorv32

bootloader makefile

Closed this issue · 5 comments

mahdi259 commented

Hi
I appreciate utilization of parameters in bootloader image generator. Unfortunately some parameters are not recognized and I'm not able to change them in make command. Any idea?

make USER_FLAGS+=-DUART_BAUD=115200 USER_FLAGS+=-SPI_FLASH_SECTOR_SIZE=4096 clean_all bootloader

And the result is:

/content/neorv32/sw/bootloader
riscv32-unknown-elf-gcc: error: unrecognized command-line option '-SPI_FLASH_SECTOR_SIZE=4096'
make: *** [../../sw/common/common.mk:172: bootloader.c.o] Error 1
stnolting commented

You need to put a -D in front of each define that you want to alter. Just add this to your SPI flash definition and it should work:

make USER_FLAGS+=-DUART_BAUD=115200 USER_FLAGS+=-DSPI_FLASH_SECTOR_SIZE=4096 clean_all bootloader
  • 👍1
mahdi259 commented

Thanks a lot

mahdi259 commented

May I ask what -D does?

stnolting commented

It is just a GCC preprocessor flag: https://gcc.gnu.org/onlinedocs/gcc/Preprocessor-Options.html

It basically (re-)defines a #define.

  • 👍1
mahdi259 commented

Thanks a lot

  • 👍1